U.S. patent application number 10/985260 was filed with the patent office on 2005-07-14 for pressurized flush system.
Invention is credited to Li, Feiyu.
Application Number | 20050150038 10/985260 |
Document ID | / |
Family ID | 34743092 |
Filed Date | 2005-07-14 |
United States Patent
Application |
20050150038 |
Kind Code |
A1 |
Li, Feiyu |
July 14, 2005 |
Pressurized flush system
Abstract
A pressurized flush system includes a pressure water vessel
having an inlet and an outlet. An infill valve, an open valve, and
a flush valve are provided with the flush valve disposed within the
pressure vessel and in fluid communication with the infill valve
and the open valve. The flush valve includes a hollow valve body
and cooperating pistons controlling water discharge from the water
vessel outlet. The cooperating pistons are disposed within the
hollow valve body.
Inventors: |
Li, Feiyu; (Xiamen,
CN) |
Correspondence
Address: |
WALTER A. HACKLER, Ph.D.
PATENT LAW OFFICE
SUITE B
2372 S.E. BRISTOL STREET
NEWPORT BEACH
CA
92660-0755
US
|
Family ID: |
34743092 |
Appl. No.: |
10/985260 |
Filed: |
November 10, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60535738 |
Jan 8, 2004 |
|
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Current U.S.
Class: |
4/354 |
Current CPC
Class: |
E03D 3/10 20130101; E03D
3/04 20130101 |
Class at
Publication: |
004/354 |
International
Class: |
E03D 003/10; E03D
001/02 |
Claims
What is claimed is:
1. A pressurized flush system comprising: a pressure water vessel,
having an inlet and an outlet; an infill valve; an open valve; and
a flush valve disposed within said pressure water vessel and in
fluid communication with said infill valve and said open valve,
said flush valve comprising: a hollow valve body; and cooperating
pistons controlling water discharge from the water vessel outlet,
said cooperating pistons being disposed within said hollow valve
body.
2. The system according to claim 1 wherein said flush valve further
comprises a partition disposed within the valve body, said
partition having a hole therethrough and said cooperating piston
includes a big piston disposed below said partition and a small
piston disposed above said partition within an upper cylinder
sleeve, said small piston having a bottom engaging the partition
hole.
3. The system according to claim 2 wherein said big piston, small
piston, upper cylinder sleeve, and partition divide the valve body
into a lower cavity, an upper cavity and a normal pressure
cavity.
4. The system according to claim 3 further comprises a normal
pressure opening disposed in said normal pressure cavity and said
small piston include an opening in the bottom thereof communicating
with said upper cavity.
5. The system according to claim 4 wherein said open valve includes
an open valve body with an inlet connected with an outlet of the
flush valve, said open valve body includes a water release hole
connected to the normal pressure cavity, and said open valve
includes a spring loaded handle having a side covering and sealing
the open valve body inlet.
6. The system according to claim 2 further comprising a combination
valve disposed between the infill valve and the water vessel inlet,
said combination valve including a pressure-controlled valve
disposed in a manner shutting of the vessel inlet when the water
vessel is discharging water and an air-in device disposed in a
manner filling air into the water vessel when water is filled into
the water vessel.
7. The system according to claim 6 wherein said pressure-controlled
valve includes an infill cavity, a water pressure cavity, an infill
piston and a pressure-controlled spring, the infill cavity being
connected respectively with the inlet duct and the outlet duct of
the combination valve; the water pressure cavity being connected
with the outlet of the combination valve.
8. The system according to claim 7 further comprises a through hole
partition disposed between the infill cavity and the water pressure
cavity and the infill piston is disposed inside the water pressure
cavity on which is set a piston rod, which goes through the
partition through hole and reaches into an outlet duct with the
push of the pressure-controlled spring with and end forming a seal
with the outlet duct.
9. The system according to claim 8 wherein a spout is disposed
inside the outlet duct of the combination valve, the spout having a
necked bottom and an air-in ball valve is disposed in a ring shaped
cavity between the outlet duct and the spout, the ball valve
forming an air-in device with the spout.
10. The system according to claim 1 further comprising a water
release tube disposed inside the flush valve and located in a
middle of the upper cylinder sleeve and extending to the water
vessel outlet, a check valve being disposed inside the water
release tube.
11. The system according to claim 1 further comprising an outer
flank surrounding the vessel outlet and defining an annulus outlet
therebetween, the flank including a normal pressure water release
hole and a ring shaped check valve is disposed in said annulus
outlet below the normal pressure water release hole.
12. The system according to claim 6 further comprising an
anti-siphon ball valve disposed in a combination valve inlet duct,
the anti-siphon ball valve opening when the pressure in a water
supply line is equal or lower than atmospheric pressure.
13. The system according to claim 12 further comprising a check
ball valve disposed in a channel between the connecting valve inlet
duct and a combination valve outlet duct, the check ball valve
shutting off when pressure in the combination valve outlet duct is
higher than pressure in the combination valve inlet duct.
Description
[0001] The present application is a continuation of U.S.
Provisional Patent Application Ser. No. 60/535,738 filed Jan. 8,
2004. This referenced patent application is to be incorporated into
the present application in its entirety by this specific reference
thereto.
[0002] The present invention is generally related to pressurized
flushed systems for toilets and is more specifically directed to a
flushing system that maximizes the efficiency of effluent transport
within a pressure baffle and discharge to a toilet bowl.
[0003] Water conservation is an environmental consideration and has
resulted in strict controls being placed on domestic water
usages.
[0004] Pressurized flushed systems have been developed to conserve
water use.
[0005] Often prior art systems do not efficiently discharge water
and often require a user to hold open a valve in order that water
is fully discharged. Accordingly, a user is required to cooperate
with time delay operation in order to efficiently discharge the
water from the pressure tank.
[0006] In addition, any prior art devices have no air-in provision.
This does not provide efficient water filling into the
pressure.
[0007] The present invention overcomes the drawbacks of the prior
art.
SUMMARY OF THE INVENTION
[0008] The present invention provides an improved structure in
which flush performance is not influenced by a users' habits, while
providing for simple structure to accomplish this aim.
[0009] A pressurized flush system in accordance with the present
invention generally includes a pressure water vessel, having an
inlet and an outlet, an infill valve, an open valve, and a flush
valve disposed within said pressure water vessel and in fluid
communication with said infill valve and said open valve. More
particularly, the flush valve includes a hollow valve body and
cooperating pistons for controlling water discharge from the water
vessel outlet. The cooperating pistons are disposed within the
hollow valve body.
[0010] Further, the system flush valve includes a partition
disposed within the valve body, with the partition having a hole
therethrough and the cooperating pistons include a big piston
disposed below the partition and a small piston disposed above the
partition within an upper cylinder sleeve, the small piston having
a bottom engaging the partition hole.
[0011] Accordingly, the big piston, small piston, upper cylinder
sleeve, and partition divide the valve body into a lower cavity, an
upper cavity and a normal pressure cavity.
[0012] A normal pressure opening may be disposed in the normal
pressure cavity and the small piston may include an opening in the
bottom thereof communicating with said upper cavity.
[0013] More particularly, the open valve includes an open valve
body with an inlet connected with an outlet of the flush valve, the
open valve body includes a water release hole connected to the
normal pressure cavity, and the open valve includes a spring loaded
handle having a side covering and sealing the open valve body
inlet.
[0014] The system further includes a combination valve disposed
between the infill valve and the water vessel inlet, with the
combination valve including a pressure-controlled valve disposed in
a manner shutting of the vessel inlet when the water vessel is
discharging water and an air-in device disposed in a manner filling
air into the water vessel when water is filled into the water
vessel.
[0015] Still more particularly in accordance with the present
invention the pressure-controlled valve includes an infill cavity,
a water pressure cavity, an infill piston and a pressure-controlled
spring, the infill cavity being connected respectively with the
inlet duct and the outlet duct of the combination valve; the water
pressure cavity being connected with the outlet of the combination
valve.
[0016] In addition, the system may include a through hole partition
disposed between the infill cavity and the water pressure cavity
and the infill piston may be disposed inside the water pressure
cavity on which is set a piston rod, which goes through the
partition through hole and reaches into an outlet duct with the
push of the pressure-controlled spring with and end forming a seal
with the outlet duct.
[0017] Further, a spout may be disposed inside the outlet duct of
the combination valve with the spout having a necked bottom and an
air-in ball valve is disposed in a ring shaped cavity between the
outlet duct and the spout, the ball valve forming an air-in device
with the spout.
[0018] More specifically, the system includes a water release tube
disposed inside the flush valve and located in a middle of the
upper cylinder sleeve and extending to the water vessel outlet, a
check valve being disposed inside the water release tube.
[0019] Still more particularly, the system includes an outer flank
surrounding the vessel outlet and defining an annulus outlet
therebetween, the flank including a normal pressure water release
hole and a ring shaped check valve is disposed in said annulus
outlet below the normal pressure water release hole.
[0020] The system may also include an anti-siphon ball valve
disposed in a combination valve inlet duct, the anti-siphon ball
valve opening when the pressure in a water supply line is equal or
lower than atmospheric pressure.
[0021] Finally, the system may also include a check ball valve
disposed in a channel between the connecting valve inlet duct and a
combination valve outlet duct, the check ball valve shutting off
when pressure in the combination valve outlet duct is higher than
pressure in the combination valve inlet duct.
[0022] The flush system in accordance with the present invention
has the following advantages:
[0023] 1. The structure of the flush valve facilitates effective
operation.
[0024] As the present invention has one big and one small piston in
the flush valve, and the flush valve body is divided into three
cavities; the upper cavity, the lower cavity, and the normal
pressure cavity, when to flush the toilet, it is only needed to
discharge a small portion of water in the upper cavity to open the
big piston, and water in the lower cavity can be temporarily stored
in the normal pressure cavity. As pressurized water that need be
discharged from the flush valve is much less than that of the prior
art, the open valve is not required to be complicated. Generally
speaking, only a simple restoring device is needed for the open
valve, with which the pressurized water in the upper cavity can be
fully discharged with a short press, and the pressurized water in
the lower cavity can be temporarily stored in the normal pressure
cavity until the flush is completed. And thus the structure of the
open valve is much simplified, and the water flush volume as well
as the flush performance will not be influenced by different press
habits of users.
[0025] 2. An air-in device is added at the pressure-controlled
switch, performing a combination valve, which improves the flush
performance. The present invention utilizes the high-speeded water
flow during the initial period, making it carry air when filling
and add air into the pressure water vessel, and thus a better flush
performance can be attained.
[0026] 3. The combination valve mentioned in the present invention
is a valve with multiple functions, including a pressure-controlled
valve, an air-in device, an anti-siphon device, and a check
valve.
[0027] Among these, the pressure-controlled valve can attain a
purpose of not to infill when flushing, and can make the flush
volume more steady, preventing leakage when the flush valve cannot
close due to the low pressure in the water supply system; the
air-in device can fill some air into the pressure water vessel when
water is filling; the anti-siphon device and the check valve device
can prevent backflow from the pressure water vessel into the water
supply system and making it polluted.
[0028] 4. In the flush valve of the present invention is set a
water release tube, which, during the refill stage, can release
water stored in the normal pressure cavity when flushing the toilet
bowl. There is also a check valve in the water release tube, which
can prevent backflow of wastewater from the toilet bowl into the
normal pressure cavity caused by the resistance from the toilet
bowl when flushing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The advantages and features of the present invention will be
better understood by the following description when considered in
conjunction with the accompanying drawings in which:
[0030] FIG. 1 is a sectional view of the present invention (not in
function);
[0031] FIG. 2 is a sectional view of the present invention under
efficient flushing stage;
[0032] FIG. 3 is a sectional view of the present invention under a
posterior stage of flushing;
[0033] FIG. 4 is a sectional view of the present invention in a
refilling stage;
[0034] FIG. 5 is a sectional view of the present invention in a
refilling stage; and
[0035] FIG. 6 is a diagrammatical sketch of a prior art pressurized
flush system.
DETAILED DESCRIPTION
[0036] With reference to FIG. 6, there is shown a prior art
pressurized flush system used in toilets that has been widely
accepted due to its saving more water than a conventional normal
pressure flush system.
[0037] As shown in FIG. 6, this pressurized flush system comprises
a pressure water vessel 1' fixed in a ceramic tank 6', an infill
valve 2', a flush valve 4', and an open valve 5' which can
discharge the pressurized water from the flush valve 4'. The flush
valve 4' is fixed through the pressure water vessel 1' and seals
it. Above the outlet 14' in the pressure water vessel 1' is set a
refill bar 15', in the bottom of which is set at least one refill
orifice 151.
[0038] The flush valve 4' mainly includes a hollow valve body 41'
fixed in the pressure water vessel 1', and a flush piston 42' which
is set in the valve body 41' and can hermetically slide in it. The
bottom of the flush piston 42' can seal the outlet 14' of the
pressure water vessel 1', and on the valve body 41' are set an
inlet 411' and an outlet 412'. Besides, between the infill valve 2'
and the inlet 18' of the pressure water vessel 1' is set a
pressure-controlled switch 3' which closes the inlet 18' when water
is being discharged from the pressure water vessel 1'. The inlet
411' of flush valve 4' is connected with the pressure-controlled
switch 3', and the outlet 412' is connected with the open valve
5'.
[0039] However, the prior art described has disadvantages as
follows:
[0040] 1. The structure of the flush valve 4' is too simple, and
especially, the flush valve cavity 44' above the flush piston 42'
is too big, and thus the water that need be discharge is too much,
and all the water will go through the open valve 5', which requires
the user delay some time when opening the open valve 5', otherwise,
water in the flush valve cavity 44' cannot be fully discharged,
making the flush piston close too early, which influences the flush
performance for the toilet. Whereas if is not realistic to request
the user to cooperate on the time delay, and then the open valve 5'
need to have the time delay function, which will make the open
valve 5' too complicated.
[0041] 2. There is no air-in device. Although in the above patent
application the pressure water vessel 1' is under normal pressure
during the terminal phase of flushing and the refill process, air
form the outside can fill into the pressure water vessel 1' during
this period, and a wanted flush performance can be reached even
though there is no air-in device, however, during the initial phase
of water filling into the pressure water vessel, the energy of
high-speeded water flow is not utilized but wasted. If to add an
air-in device here, more energy can be stored in the pressure water
vessel 1', and the flush performance can be better.
[0042] As shown in FIG. 1, the present invention includes a
pressure water vessel 1, an infill valve 2, a combination valve 3,
a flush valve 4, and an open valve 5. The infill valve 2 is fixed
at the bottom of the pressure water vessel 1; the combination valve
3 is fixed on the top of the pressure water vessel 1; the flush
valve 4 is fixed through the pressure water vessel 1; and the open
valve 5 can be fixed at any position of the ceramic toilet tank 6,
namely, the front, side or top of the toilet tank. Below is the
detailed description of all these sub assemblies.
[0043] The Pressure Water Vessel
[0044] The pressure water vessel 1 is a sealed container made of
high-strength and high-stability material. An opening 11 is
centered on the top of the pressure water vessel 1. The outlet 12
is set under the opening 11 and some external threads are set in
the peripheral lower section of the outlet 12 to connect with the
inlet of the toilet tank. A locating plate 13 is set at the top of
the outlet 12. An outlet 14 is set under the locating plate 13 and
inside the upper section of the outlet 12, and its inner diameter
is smaller than the diameter of the outlet 12. The cylindrical
refill bar 15 is set at the peripheral of the locating plate
13.
[0045] The height of the cylindrical refill bar 15 can be adjusted
according to different refill rate requirements. This adjustment
can be implemented by adjusting the threads or any other ways. At
least one refill orifice 151 is set at the bottom of the refill bar
15. In addition, the normal pressure water release hole 16 is set
in the sidewall of the upper section of the outlet 12. The ring
shaped checked valve 17 is set in the ring area between the outlet
12 below the normal pressure water release hole 16 and the outlet
14. This device can discharge the normal pressure water in the
ceramic toilet tank 6. Besides, the inlet 18 is set on the upper
section of one side of the pressure water vessel 1.
[0046] The pressure water vessel 1 is installed inside a ceramic
water tank 6, with external threads on a lower section of the
outlet 12 threaded in the inlet of the standard toilet (not
shown).
[0047] The Infill Valve
[0048] The infill valve 2 includes a valve body 21, a valve rod
assembly 22, and a valve support 23.
[0049] The valve body 21 is a hollow cylinder with an outlet 211 in
the front portion and several overflow openings 212 set in the wall
panel. A seal gland 213 with a through hole is set in the inner
rear portion.
[0050] The valve rod assembly 22 is set in the valve body 21,
including the valve rod 221, the valve rod spring 222. The valve
rod 221 is hollow inside. A seal component 223 is set in the front
portion of the valve rod, forming seal with the valve body 21. The
posterior segment of the valve rod 221 goes through the through
hole of the seal gland 213, forming seal with the seal component
224.
[0051] The valve support 23 is fixed at the rear end of the valve
body 21. The movable valve support 231 and the spring 232 are set
inside the valve support 23. Pushed by the spring 232, the movable
valve support 231 pushes against the valve rod 221. The inlet 233
is set in the sidewall of the valve support 23.
[0052] The assembled fill valve 2 is fixed onto the ceramic water
tank 6 with the inlet 233 connected with the charging duct (not
shown in the drawing) of the water supply system, and the outlet
211 is connected by hose with the inlet duct 31 of the combination
valve 3 described below.
[0053] The infill valve 2 also has the function of pressure
stabilizer. Namely, when the pressure in the pressure water vessel
1 is higher than the set value, the inner pressure will be released
through the overflow outlet 212 of the infill valve 2 into the
ceramic toilet tank 6 until the pressure in front of the infill
valve 2 is equal to that of the rear. The structure and the
stabilizing process is the same as the technology of the previous
application, and will not be described here.
[0054] The Combination Valve 3
[0055] Inside the combination valve are set an inlet duct 31, an
anti-siphon ball valve 32, a check valve 33, an outlet duct 34, a
spout 35, a flush control valve 36, an air-in valve 37, and an
outlet 39 connecting the flush valve 4 and open valve 5. Among
these:
[0056] The inlet duct 31 is connected with the infill valve 2.
[0057] The anti-siphon ball valve 32 is set on the upper section of
the inlet duct 31. When the inlet duct 31 is filled with
pressurized water, the anti-siphon valve 32 closes; when the
pressure in the water supply system is equal or lower than the
atmospheric pressure, the anti-siphon valve 32 opens.
[0058] The check valve 33 is set in the channel between the inlet
duct 31 and the outlet duct 34. When the pressure in the outlet
duct 34 is higher than that in the inlet duct 31, the check valve
33 closes, otherwise, opens.
[0059] The bottom of the outlet duct 34 is connected with the inlet
18 of the pressure water vessel 1. Inside the outlet duct 34 is set
the spout 35, the lower end of which is set as a conic necking
segment.
[0060] Above the outlet duct 34 is set the pressure-controlled
switch 36, which includes the infill cavity 361, the water pressure
cavity 362, the infill piston 363 and the pressure-controlled
spring 364. The infill cavity 361 is connected with the check valve
33. A partition 30 with a through hole is set between the infill
cavity 361 and the water pressure cavity 362.
[0061] The infill piston 363 is set inside the water pressure
cavity 362.
[0062] The piston rod 365 of the infill piston 363 goes through the
through hole 301, and, with the push of the pressure-controlled
spring 364, reaches into the spout 35 inside the outlet duct 34. An
the seal component 366 set at the ending of the pressure-controlled
spring 364 forms seal with the spout 35.
[0063] The air-in ball valve 37 is set in the ring chamber between
the outlet duct 34 and spout 35. The air-in ball valve 37 and the
spout 35 form an air-in device.
[0064] The outlet 39 is set on the bottom sidewall of the water
pressure cavity 362, and is connected with the inlet 411 of the
flush valve 4, and then connecting the inlet 52 of the open valve
52.
[0065] In addition, the piston rod 365 and the through hole 362 are
a small gap fitting-in. Namely, when the infill piston 363 closes,
the pressurized water can goes slowly through the small gap from
the infill cavity 361 to the water pressure cavity 362. The
fitting-in with small gap has various kinds of structure, but this
is not the major point of the present invention, and will not be
further described. As shown in the drawing, this small gap
fitting-in is to open a small cross-section V groove on the piston
rod 365.
[0066] The Flush Valve 4
[0067] The flush valve is set through inside the pressure water
vessel 1, and forms seal with the pressure water vessel 1. The
flush valve 4 includes a hollow valve body 41, a big piston 42, an
upper cylinder sleeve 43, a small piston 44, and a spring 45. Among
these:
[0068] Above the valve body 41 are set the inlet 411 and outlet 412
(The drawing is just a diagrammatical sketch, in which the inlet
411 and outlet 412 are shown as one part.); the valve body 41 is
placed inside the pressure water vessel 1 through the opening 11 on
its top; the bottom of the valve body is fixed on the locating
plate 13 in the pressure water vessel 1. The inlet 411 is connected
with the outlet 39 of the combination valve 3; the outlet 412 is
connected with the inlet 52 of the below described open valve 5.
Above the valve body 41 is set a normal pressure orifice which is
connected with the outside; inside the middle of the valve body 41
is set a partition 414 with a through hole.
[0069] The big piston 42 is set sliding below the partition 414
inside the valve body 41. The seal component 422 seals the space
between the partition 414 and the big piston 42, forming the lower
cavity 46. A protruding plate 421 with smaller diameter is set at
the bottom of the big piston 42. A seal component 423 is set at the
bottom end of the protruding plate 421. This seal component 423 can
be pushed onto the top of the outlet 14 and seals it.
[0070] The upper cylinder sleeve 43 is fixed above the partition
414 in the valve body 41, with an inlet and an outlet, which are
connected respectively with the inlet 411, and the outlet 412 of
the valve body 41. In the middle of the upper cylinder sleeve 43 is
set a water release tube 431, which is directly connected with the
outlet 14 of the pressure water vessel 1. A check valve 432 is set
inside the water release tube 431.
[0071] A small piston 44 is fixed above the partition 414 inside
the valve body 41, with the upper part set sliding inside the upper
cylinder sleeve 43, forming seal by the seal component 441 with the
upper cylinder sleeve 43. A seal component 442 below the small
piston 44 can be pushed onto the through hole of the partition 414
of the valve body 41. Besides, at the bottom of the small piston 44
is an opening 443 connecting with the lower cavity 46.
[0072] The spring 45 is set between the upper cylinder sleeve 43
and the small piston 44. And, the upper cavity 47 is formed between
the upper cylinder sleeve 43 and the small piston 44; the normal
pressure cavity 48 is formed above the partition 414 of the valve
body 41 and around the upper cylinder sleeve 43 and the small
piston 44.
[0073] The Open Valve 5
[0074] On the body 51 of the open valve 5 is set an inlet 52, which
is connected with the outlet 412 of the flush valve 4. On the body
51 is also set a water release hole 53, which is connected through
a tube with the normal cavity 48 of the flush valve 4, and then
with the water release tube 431 of the flush valve 4. Inside the
open valve 5 is set a spring 54 and a handle 55 (or a push button).
With the push of the spring 54, a side of the handle 55 can cover
and seal the inlet 52 of the body 51.
[0075] The open valve 5 can be installed on sidewall of the ceramic
tank 6, forming a side-push structure. If the handle 55 is changed
into a push button, the open valve 5 can be installed on the top of
the ceramic tank 6, forming a top-push open button.
[0076] Working Principle
[0077] As shown in FIG. 1, the pressurized flush system described
in the present invention is in a static state, in which the water
level in the pressure water vessel 1 reaches a certain value, and
the air in it is compressed. When the pressure in the pressure tank
1 reaches the set value, the infill valve 2 shuts off, and the
inlet 18 of the pressure water tank 1 does not fill water any more.
Pressure in the pressure-controlled switch 36 of the combination
valve 3 and that in the upper cavity 46 and lower cavity 47 of the
flush valve 4 come to a balance under normal pressure. The infill
piston 363 is at the highest position (open state); the big and
small piston 42 and 44 of the flush valve 4 are at the lowest
position (closed state); the anti-siphon ball valve 32 and the
air-in ball valve 37 inside the combination valve 3 closes with the
effect of the water pressure and the check valve 33 is at the open
state; and, besides, the open valve 5 is at the closed state,
namely, with the push of the spring 54, one side of the handle 55
covers and seals the inlet 52 of the valve body 51.
[0078] As shown in FIG. 2, when to flush the toilet, press the
handle 55 of the open valve 5, making the inlet 52 open, and the
pressurized water in the upper cavity 47 of the flush valve 4 flows
into the open valve 5, and then flows through the outlet 53 of the
open valve 5 back into the normal cavity 48 of the flush valve 4,
with which the pressure in the upper cavity 47 of the flush valve 4
goes down. Now the pressure in the lower cavity 46 of the flush
valve 4 is higher than that in the upper cavity 47, so the pressure
in the lower cavity 46 will push the small piston 44 to go up,
making the pressurized water in the lower cavity 46 go through the
ring channel around the upper cavity 47 into the normal cavity
48.
[0079] Then the big piston 42 is effected at the bottom by the
pressure in the pressure water vessel 1 and goes up, making the
outlet 14 of the pressure water vessel 1 open, and starting to
flush the toilet. Meanwhile, as the open valve 5 is connected with
the water pressure cavity 362 of the pressure-controlled switch 36
in the combination valve 3, the pressure in the water pressure
cavity 362 disappears.
[0080] With the effect of the spring 364, the infill piston 363
falls rapidly, and covers and seals the spout 35, closing the inlet
18 of the pressure water vessel 1, and reaches the purpose of not
infilling water into the pressure water vessel when flushing.
Besides, during the course of flushing the toilet, the resistance
pressure makes the pressure in the water release tube 431 of the
flush valve 4 increase, pushing the check valve 432 in the water
release tube 431 to ascend, and thus preventing water in the toilet
flows into the normal pressure cavity. And at the same time, water
flowing from the upper cavity 47 of the flush valve 4 and the water
pressure cavity 362 of the pressure-controlled switch 36 through
the open valve 5, and that from the lower cavity 46 of the flush
valve 4 is stored temporarily in the normal pressure cavity 48.
[0081] As shown in FIG. 3, when the water level in the pressure
water vessel 1 goes down to the top of the refill bar 15, the
big-area outlet 14 is exposed in the compressed air in the pressure
water vessel 1. The compressed air flushes rapidly out of the
outlet 14 of the pressure water vessel 1, and pushes the water flow
in the toilet channel, which reaches the performance of a
high-speed flush of the posterior water flow, and making the
posterior flush still as strong.
[0082] As shown in FIG. 4, as now the pressure water vessel 1 is
under normal pressure, with the work of gravity the water below the
refill bar 15 flows slowly into the toilet, forming water seal, and
the whole process from flushing to refill is completed. Now as the
pressure in the toilet channel is restored into normal pressure,
the check valve 432 inside the water release tube 431 of the flush
valve 4 falls down, the water stored in the normal pressure cavity
during flushing flows through the water release tube 431 into the
toilet.
[0083] As shown in FIG. 5, during the process of flushing and
refill, as the open valve 5 has closed, the pressure in the
pressure water vessel 1 disappears, and the valve rod 221 of the
infill valve 2 opens itself by the effect of the spring 222.
[0084] The pressurized water from the water supply system flows
through the hollow valve rod 221 into the pressure-controlled
switch 36. A small portion of this pressurized water flows through
the V shaped groove in the piston rod 365 of the infill piston 363
into the water pressure cavity 362, and then into the upper cavity
47 of the flush valve 4, and next through the opening 443 in the
bottom of the small piston 44 into the lower cavity 46, and pushes
the big piston 42 to close.
[0085] As the cross section of the opening 443 in the bottom of
small piston 44 is bigger than that the V shaped groove on the
piston rod 365 of the infill piston 363, the water pressure in the
water pressure cavity 362 of the combination valve 3 cannot
increase until the small piston 42 and the big piston 44 of the
flush valve 4 close. And then this water pressure overcomes the
action force of the spring 364, making the infill piston 363
ascend, and opening the inlet 18 of the pressure water vessel 1.
Now the major portion of the pressurized water from the water
supply system flows through the spout 35 into the pressure water
vessel 1.
[0086] During the initial process of the infilling water, as the
pressure water vessel 1 is under a normal or law pressure state,
the pressure difference between the back and front of the spout 35
is comparatively big, and as the front of the spout 35 is set as a
conic necking segment, the speed of the water flowing through the
spout 35 is very high.
[0087] The high-speed water column makes the ring chamber around
the conic necking segment become vacuum, namely produce a Venturi
effect. The atmospheric pressure pushes the air-in ball valve 37
open; air is carried into the pressure water vessel 1.
[0088] With the water level in the pressure water vessel 1 going
up, the pressure goes up as well, and the Venturi effect
disappears; the air-in ball valve 37 closes with the effect of the
pressure in the pressure water vessel 1.
[0089] Now the pressurized water from the water supply system
continues flowing into the pressure water vessel 1 until the
pressure in the pressure water vessel reaches a certain value, and
then the infill valve 2 closes. The water infill process is
completed, and the whole flush system restores to the static
state.
[0090] Although there has been hereinabove described a specific
pressurized flush system in accordance with the present invention
for the purpose of illustrating the manner in which the invention
may be used to advantage, it should be appreciated that the
invention is not limited thereto. That is, the present invention
may suitably comprise, consist of, or consist essentially of the
recited elements. Further, the invention illustratively disclosed
herein suitably may be practiced in the absence of any element
which is not specifically disclosed herein. Accordingly, any and
all modifications, variations or equivalent arrangements which may
occur to those skilled in the art, should be considered to be
within the scope of the present invention as defined in the
appended claims.
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